CN103850875B - Spare system and method are yawed for being provided for wind field - Google Patents
Spare system and method are yawed for being provided for wind field Download PDFInfo
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- CN103850875B CN103850875B CN201310629004.1A CN201310629004A CN103850875B CN 103850875 B CN103850875 B CN 103850875B CN 201310629004 A CN201310629004 A CN 201310629004A CN 103850875 B CN103850875 B CN 103850875B
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- 238000000034 method Methods 0.000 title claims description 24
- 238000006243 chemical reaction Methods 0.000 claims abstract description 136
- 238000004146 energy storage Methods 0.000 claims abstract description 59
- 230000005540 biological transmission Effects 0.000 claims abstract description 26
- 230000008859 change Effects 0.000 claims description 47
- 230000005611 electricity Effects 0.000 claims description 11
- 230000009466 transformation Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 6
- 239000000725 suspension Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 230000009183 running Effects 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 241000208340 Araliaceae Species 0.000 description 1
- 206010008190 Cerebrovascular accident Diseases 0.000 description 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 1
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- 208000006011 Stroke Diseases 0.000 description 1
- 230000009471 action Effects 0.000 description 1
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- 235000008434 ginseng Nutrition 0.000 description 1
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- 230000003068 static effect Effects 0.000 description 1
- 230000002123 temporal effect Effects 0.000 description 1
- 201000009482 yaws Diseases 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D7/00—Controlling wind motors
- F03D7/02—Controlling wind motors the wind motors having rotation axis substantially parallel to the air flow entering the rotor
- F03D7/0204—Controlling wind motors the wind motors having rotation axis substantially parallel to the air flow entering the rotor for orientation in relation to wind direction
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2260/00—Function
- F05B2260/845—Redundancy
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2270/00—Control
- F05B2270/10—Purpose of the control system
- F05B2270/107—Purpose of the control system to cope with emergencies
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2270/00—Control
- F05B2270/30—Control parameters, e.g. input parameters
- F05B2270/305—Tolerances
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2270/00—Control
- F05B2270/30—Control parameters, e.g. input parameters
- F05B2270/321—Wind directions
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2270/00—Control
- F05B2270/30—Control parameters, e.g. input parameters
- F05B2270/337—Electrical grid status parameters, e.g. voltage, frequency or power demand
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Wind Motors (AREA)
Abstract
The present invention provides a kind of yaw back-up system.The yaw back-up system includes the energy storage medium for storing auxiliary power.The yaw back-up system further includes yawer, for coordinating the power Transmission from the energy storage medium to yaw motor in grid cut-off, to control the yaw angle of wind energy conversion system.The yawer executes following steps：After a period of time wind direction signals are received from sensor；Variation based on the wind direction signals over a period changes the permission limit of wind energy conversion system；And it is based on the permission limit, it controls from the auxiliary power of the energy storage medium to the power Transmission of the yaw motor, to control the yaw angle, to reduce on the wind energy conversion system by wind-induced load.
Description
Technical field
Present invention relates in general to a kind of wind energy conversion systems, exactly, are related to a kind of wind energy conversion system offer for into wind field
Yaw spare system and method.
Background technology
Wind energy conversion system is used for by using the wind power generation in environment.Since wind energy is natural resources, wind speed and direction
Variation be unable to control and may cause to generate bad load in wind energy conversion system.Therefore, wind energy conversion system includes multiple wind turbine components,
Such as yaw and pitch motor, for reduce to the maximum extent this badness load.Under normal operating conditions, these wind energy conversion systems
Component is run based on the electric power received from wind energy conversion system or the power network for being connected to wind energy conversion system.
Under some cases that wind energy conversion system receives the wind speed or other conditions that may lead to not realize conventional operation, wind-force
Machine operation suspension and may be disconnected with power network.In such cases, if wind turbine component is not from wind energy conversion system or electricity
Power net receives electric power, then wind turbine component operation suspension and may cause wind energy conversion system to damage.To exempt from the operation of wind turbine component
Pause has been that wind turbine component is powered in the time interval of wind energy conversion system operation suspension using a variety of methods.
It is powered for wind turbine component using energy storage medium.But include the legacy system of energy storage medium
It is wind turbine component power supply based on static operation mode, it is thus possible to the quick change because of wind speed and direction can not be efficiently controlled
The load changed and generated in wind energy conversion system.In addition, the operation of conventional system causes to exhaust stored energy early, it is therefore desirable to
Massive energy storage medium.
Therefore, it is necessary to improve system to solve the above problems.
Invention content
In short, according to one embodiment, the present invention provides a kind of yaw back-up system.The yaw back-up system includes
Energy storage medium for storing auxiliary power.The yaw back-up system further includes yawer, for disconnected in power grid
Coordinate in the case of electricity from the energy storage medium to for reducing and the power Transmission of the yaw motor of the yaw deviation of wind direction.
The yawer executes following steps：After a period of time wind direction signals are received from sensor；Existed based on wind direction signals
Variation on a period of time and the permission limit for changing wind energy conversion system；And the permission limit handling is based on from the energy storage
Power Transmission from the auxiliary power of medium to the yaw motor, to control yaw angle, to reduce on the wind energy conversion system by wind
Caused load.
Another embodiment provides a kind of wind fields including yaw back-up system.The wind field includes for producing
Raw wind-powered electricity generation and the wind energy conversion system that wind-powered electricity generation is transferred to power network, wherein the wind energy conversion system is electrically connected to each other.The wind field further includes connecting
It is connected to the yaw back-up system of the corresponding wind energy conversion system in wind field, for controlling the electric power to yaw motor in grid cut-off
Conveying, to control the yaw angle of corresponding wind energy conversion system, wherein the yaw back-up system includes respectively for storing auxiliary power
Energy storage medium.The yaw back-up system further includes yawer, the yawer after a period of time from
Sensor receives wind direction signals；The permission limit of corresponding wind energy conversion system is changed with time and changed based on wind direction signals；The company of calculating
It is connected to the auxiliary power rank of the energy storage components of corresponding wind energy conversion system；By the auxiliary power rank of calculating wind corresponding to being connected to
The predetermined auxiliary power rank of the energy storage components of power machine is compared；And controlled based on the permission limit to for
The power Transmission that controls the corresponding yaw motor of the yaw angle of corresponding wind energy conversion system is generated on the wind energy conversion system by wind to reduce
Load.The yawer is based on allowing limit, and electricity is assisted in the calculating for being connected to the energy storage medium of corresponding wind energy conversion system
Control slave phase answers the power Transmission of the energy storage components of wind energy conversion system when power rank is more than predetermined auxiliary power rank；Or even
Control is from even when being connected to the calculating auxiliary power rank of the energy storage medium of corresponding wind energy conversion system less than predetermined auxiliary power rank
It is connected to the power Transmission of the energy storage components of the different wind energy conversion systems of corresponding wind energy conversion system, to control the yaw angle.
Another embodiment provides a kind of wind energy conversion systems for into wind field to provide yaw spare method.Institute
It includes receiving wind direction signals from sensor after a period of time to state method.The method further includes based on wind direction signals at one section
Temporal variation and change the permission limit of wind energy conversion system.The method further includes being based on the permission limit handling from energy
The power Transmission for measuring the yaw motor of storage medium wind machine, to control the yaw angle of the wind energy conversion system, described in reducing
By wind-induced loading condition in wind energy conversion system.
Description of the drawings
After refer to the attached drawing reads following detailed description, it is better understood with these and other features, the aspect of the present invention
And advantage, in the accompanying drawings, similar part in all attached drawings of similar symbology, wherein：
Fig. 1 is the schematic diagram of wind field according to an embodiment of the invention, the wind field include be connected to accordingly yaw it is standby
With the wind energy conversion system of system.
Fig. 2 is the schematic diagram of part wind field according to an embodiment of the invention, and the wind field is included in power grid and loses item
Two wind energy conversion systems of corresponding yaw back-up system are connected under part.
Fig. 3 is graphical representation of the wind direction relative to the change rate of time.
Fig. 4 is flow chart according to an embodiment of the invention, is shown for yawing back-up system shown in implementing Fig. 3
Involved step in the illustrative methods of first work period and the second work period.
Fig. 5 is the schematic diagram of part wind field according to an embodiment of the invention, and the wind field is included in power grid and loses item
It is connected to two wind energy conversion systems of corresponding yaw back-up system under part and forms the micro power network that the two wind energy conversion systems are connected to each other.
Fig. 6 is flow chart according to an embodiment of the invention, show in grid cut-off into wind field
The yaw motor of each wind energy conversion system provides step involved in the method for yawing non-firm power.
Specific implementation mode
The embodiment of the present invention includes a kind of yaw back-up system, and the yaw back-up system includes for storing auxiliary electricity
The energy storage medium and yawer of power, the yawer are used to coordinate from the energy in grid cut-off
Storage medium is measured to the power Transmission of yaw motor and the yaw angle for controlling wind energy conversion system.The yawer passes through one
Wind direction signals are received from sensor and wind energy conversion system is changed based on wind direction signals variation over a period after the section time
Allow limit（tolerance level）.The yawer is based on allowing limit and controlling from the energy storage medium
Power Transmission from auxiliary power to yaw motor to control yaw angle, to reduce on the wind energy conversion system generated by wind it is negative
It carries.
It includes the wind energy conversion system for being connected to corresponding yaw back-up system 18,20,22 that Fig. 1, which is according to an embodiment of the invention,
12, the schematic diagram of 14,16 wind field 10.Wind field 10 includes the wind energy conversion system 12,14,16 with wind power generation.For ease of understanding, it is illustrated that
Include the exemplary wind farm 10 of three wind energy conversion systems 12,14,16.But in wind field 10 can there are one or multiple wind energy conversion systems.Wind
Power machine 12,14,16 generates electricity and delivers power to power network 24 by electric wire 25.Wind field 10 includes the distributed spare system of yaw
System, wherein each wind energy conversion system 12,14,16 is connected to corresponding yaw back-up system 18,20,22, the yaw back-up system exists
To corresponding wind energy conversion system in the case of grid cut-off（As shown in Figure 2）Auxiliary power is provided and controls corresponding wind energy conversion system 12,14,16
Yaw motor, to change the yaw angle of corresponding wind energy conversion system 12,14,16, to reduce the load generated by wind.Each wind energy conversion system
12,14,16 yaw back-up system 18,20,22 can be communicatively connect to sensor 26, when the sensor passes through one section
Between after measure and wind speed and direction and wind speed and direction signal 28 be transferred to each wind energy conversion system 12,14,16.In one embodiment
In, sensor 26 may include multiple sensors, and the sensor can be located at the different location of wind field 10, to measure wind field 10
Different location at wind speed and direction.In this embodiment, one or more of sensor 26 sensor can be with communication party
Formula is connected to each yaw back-up system 18,20,22.In a particular embodiment, sensor 26 includes airspeedometer.
Fig. 2 is the schematic diagram of part wind field 30 according to an embodiment of the invention, and the wind field is included in power grid loss
Under the conditions of be connected to two wind energy conversion systems 12,14 of corresponding yaw back-up system 18,20.Each wind energy conversion system 12,14 is via corresponding
Wind energy conversion system breaker 32,33 is connected to corresponding electric wire 25.Electric wire 25 can be connected to electricity via utility power breaker 36
Power net 24.During conventional operation, corresponding wind energy conversion system breaker 32,33 is closed, and electric power is via utility power breaker 36
It is transported to power network 24, mains break device 36 is also closed and the wind energy conversion system 12,14 in wind field 30 is connected to power network 24.
Under the conditions of the extreme winds such as storm and hurricane, power network 24 can be by by utility power breaker 36
It is switched to off-state and disconnects the connection of its own and wind field 30, subsequent wind energy conversion system 12,14 operation suspensions.In one embodiment
In, wind energy conversion system 12,14 can also disconnect mutual company by corresponding wind energy conversion system breaker 32,33 is switched to off-state
It connects.In the embodiment that wind energy conversion system breaker 32,33 is off, the yaw for being connected to corresponding wind energy conversion system 12,14 is spare
System 18,20 brings into operation and powers to corresponding yaw motor 34,35, to change the yaw of corresponding wind energy conversion system 12,14
Angle.
It includes energy storage components 38,40 to yaw back-up system 18,20, and the energy storage components are for storing auxiliary electricity
Power is to operate yaw motor 34,35 and yawer 42,44.Yawer 42,44 can be in normal mode（Non- explanation
Theme in book）Middle operation is to adjust yaw angle, and operation is to control in standby mode that in addition can be described in the present specification
It is transported to the auxiliary power of yaw motor 34,35, to control the yaw angle of corresponding wind energy conversion system 12,14.In one embodiment,
Auxiliary power can also be respectively supplied to additional auxiliary wind turbine component 46,48 by energy storage components 38,40.In specific reality
It applies in example, additional auxiliary wind turbine component 46,48 includes pump, heater, fan and pitch motor.Corresponding yaw back-up system
18, the yawer 42,44 in 20 respectively with sensor 26（As shown in Figure 1）It communicates and after a period of time from sensing
Device receives wind speed and direction signal（As shown in Figure 1）.
First, each yawer 42,44 is by being pre-configured with, to include, for example, corresponding wind energy conversion system 12,14 is negative
Carry distribution, the position of corresponding wind energy conversion system 12,14, predetermined queries table and corresponding wind energy conversion system 12,14 angular variation dead zone limit.
In one embodiment, the dead zone limitation of angular variation includes about negative（-）Octave is to just（+）The range of octave.Corresponding wind energy conversion system 12,
14 load distribution includes the bearing capacity of the wind turbine components such as pneumatic equipment bladess and tower.
Under the conditions of extreme wind, yaw back-up system 18,20 starts standby operation, and yawer 42,44 bases
In from sensor 26（As shown in Figure 1）The wind direction signals 28 of reception（As shown in Figure 1）, by comparing the wind speed and direction received
The change rate of wind speed and the change rate of wind direction are determined with the wind speed and direction that previously obtained.Yawer 42,44 passes through ginseng
Predetermined queries table is examined to determine that permission limit, the inquiry table provide change rate and the permission of the change rate of wind speed, wind direction
Correlation between limit.In one embodiment, each of wind energy conversion system allows limit to include that can be held relative to wind energy conversion system
By specific yaw angle without there is the range of the wind speed change rate and wind vector rate of the time of any abrasion.Although it is recommended that wind
Factorization is carried out to change rate and wind speed change rate, but in some embodiments, allow limit that can be based only upon wind direction and becomes
Rate or the change rate combined with wind speed based on wind direction.
In one embodiment, yaw back-up system 18,20 is connected to corresponding line side converter by DC link
50,52, and yawer 42,44 is based on the modulation index for allowing limit and control line trackside converter 50,52, below
The referred to as work period, to control the frequency to transmit electric power to corresponding yaw motor 34,35.Yawer 42,44 is based on specific
Allow limit and changes work period of line side variator 50,52（Alternatively, in other words, adjusting the frequency of yaw angle）, with true
The yaw angle of guarantor's wind energy conversion system is always in the limitation of the dead zone of wind energy conversion system.
In one exemplary embodiment, can based on wind speed change rate, wind vector rate or a combination thereof and obtain permit
Perhaps limit.In this embodiment, in specified time interval, may be used to determine there are three condition allows limit.Become in wind speed
Rate is zero（Constant wind speed）It is true based on wind vector rate and optionally wind speed and in the continually changing first condition of wind direction
Surely allow limit.In the second condition that wind speed constantly changes in being at the appointed time spaced but wind direction is constant, wind speed will be based on and changed
Rate and the permission limit for calculating wind energy conversion system.In the continually changing third condition of wind speed and direction, wind speed change rate will be based on
Combination with wind vector rate and determine permission limit.In this embodiment, it repeats to determine after a period of time and allows limit
Process, and yawer 42,44 changes corresponding wind energy conversion system based on the wind speed and direction signal received over time
12,14 permission limit（To change the frequency of yaw angle adjustment）.
Yaw motor 34,35 converts 50, the 52 voltage runnings provided based on respective lines side, to change corresponding wind energy conversion system
12,14 yaw angle.The required yaw of yaw angle in corresponding time interval is calculated based on limit, yawer 42,44 is allowed
Angle changes, to reduce the load on corresponding wind energy conversion system 12,14.Yawer 42,44, which is based further on, allows limit to determine phase
The work period answered and manages in given week time wherein the work period represents the predetermined adjustment frequency of yaw angle
Event number in phase, in the event, line side converter 50,52 is opened to power to yaw motor 34,35, to change
Yaw angle in designated time period.Yawer 42,44 be based further on required yaw angle variation and yaw motor 34,
35 angular torque capability and determine yaw motor 34,35 need for the work period each event run duration.
In one example, the angular torque of yaw motor 34,35 is that yaw angle per second changes 0. 3（0.3）Degree.Yawer 42,
44 application relevant work periods simultaneously controlled the frequency powered to corresponding yaw motor 34,35（Event number）And the duration, to change
Become the yaw angle of wind energy conversion system 12,14.Permission limit based on yawer 42,44 and the example that changes the work period will be under
It is described referring to Fig. 3 in text.
Fig. 3 is that wind direction is indicated relative to the exemplary patterns of the change rate of time.According to the present invention relates to the one of wind direction
Embodiment, the work period that change rate can be applied for determination by yawer.X-axis 62 represents the time（It is single with hour
Position）, and Y-axis 64 represents the variation of wind direction（As unit of degree）.In this example, the dead zone limitation of wind energy conversion system is negative（-）Eight
It spends just（+）Octave limits so that the difference between yaw angle and wind direction must not exceed dead zone, in case wind energy conversion system is worn.Yaw
Controller changes the permission limit of wind energy conversion system, so that the difference between yaw angle and wind direction maintains in the limitation of dead zone.Curve 66
Represent change rate of the wind direction in the first time interval indicated with part 67, wherein first time period of the wind direction in three hours
Interior to change 15 degree, curve 68 represents change rate of the wind direction in follow-up second time interval indicated with part 69, apoplexy
Change 15 degree into the period in subsequent one hour.Therefore, if first allows limit and from zero degree to 15 degree
Wind vector is related per hour, then in first time period, first should be used to allow limit.Similarly, if second allows to limit
Degree is related more than five degree to wind vector per hour, then in second time period, second should be used to allow limit.For explanation and
The wind vector rate of the considerations of simplicity, the second time interval are illustrated as starting from zero degree, such as the second time interval and first
Time interval is different.But in other embodiments, time interval is without discrete.In addition, in other embodiments, can use
Additional and/or different permission limit.
As described above, yawer is each corresponding permission limit implementation period.In an example,
One allows under limit, and yawer implemented for the first work period with the frequency of an event per hour, to change yaw angle.It is false
Determine wind vector rate and be fixed as five degree and the first work period per hour to be executed by yawer, the yawer will
Start the line side converter running with frequency once every hour.In addition, the yawer will calculate wind energy conversion system institute
The change of the yaw angle needed, to maintain dead zone to limit.Therefore, in this particular case, the yaw angle needed for each work period
Variation may be calculated five degree of each work period because wind vector rate be fixed as per hour five degree and per hour only one
A event powered to line side converter 50,52.Therefore, as long as first permission limit of the wind vector rate at five degree per hour
Hereinafter, then yawer will apply for the first work period and change yaw angle is primary per hour.Therefore, yawer allows
Energy storage components can power to yaw motor, so as to curve 70（First work period）Shown in five degree of change per hour
Rate changes yaw angle.Once the change rate of wind direction increases to shown in the second time interval five degree or more per hour, then partially
The permission limit of wind energy conversion system is changed into the second permission limit by route controller, to be based on the second work period shown in curve 72 and
Shorten the time between the event that line side converter is powered.For 15 degree of examples per hour, adjustment per hour can not will transport
Row maintains in the limitation of dead zone.In examples as shown in figure 3, every 20 minutes are adjusted to occur once.
In another embodiment, the difference between yaw angle and wind direction is close to before in the limitation of dead zone, yaw control
Device processed will not power to yaw motor.For example, when wind vector rate is fixed on five degree per hour, wind direction changes for every 20 minutes
Once.Therefore, after 90 minutes, the difference between yaw angle and wind direction is up to the limitation of octave dead zone.Yawer
It can be with（a）The power Transmission to yaw motor is controlled, with by making yaw angle variation once maintain in the limitation of dead zone（For example,
By the first work period with every 20 points of clockwise yaw motors power supply after 90 minutes）, or（b）It controls to yaw
The power Transmission of motor, to use more than 12 minutes frequencies for the once above variation.Similarly, in the second time interval
In, yawer can use for the second work period.It is assumed that the change rate of wind direction is fixed on 15 degree per hour, it can be said that
Wind direction was once changed with every four minutes.Therefore, the second work period may include in 32 minutes marks for once adjusting
It is whole that enough electric power is provided to yaw motor, and electric power is being provided per four minutes later to maintain in the limitation of dead zone.Or
As needed, increase the time interval between adjustment and adjustment.
As described above, the permission limit along the related work period can extraly be based on wind speed or wind speed change rate and wind
It is determined to the combination of change rate, or in some cases, such as when wind direction is constant, it can be only true by wind speed change rate
It is fixed.Change the variation for allowing limit and contributing to wind energy conversion system to mitigate wind condition using the different operating period, while relative to biography
System method uses less auxiliary energy.Term used in this specification " auxiliary energy " and " auxiliary power ", which can be interchanged, to be made
With.Therefore, can extend wind energy conversion system can use specified auxiliary power to grasp in the grid cut-offs such as storm wind and hurricane
Make the period of yaw motor, and the cost of wind-force can be reduced using smaller energy storage medium.The present invention can be with
For powering to additional auxiliary wind turbine component, to extend the duration and reduce the abrasion of wind energy conversion system part.
Fig. 4 is flow chart according to an embodiment of the invention, is shown for yawing back-up system shown in implementing Fig. 3
Involved step in the illustrative methods 80 of first work period and the second work period.The yawer is in step 82
In after a period of time from sensor receive measure wind direction.Yawer calculates time interval in step 84（For example, ten
Five minutes）Interior wind vector rate, and determine permission limit.Yawer in step 86 will calculate change rate from it is different
Limit is allowed to be compared, in the case, the different permission limits, which are the first permission limit and second, allows limit.If
Wind direction relative to the wind direction measured upper one hour change rate at five degree hereinafter, in step 88, then yawer is in wind direction
Change rate first allow limits in during use the first work period, and continue transported in the first work period
Row, until the change rate of wind direction is not increased to the first permission limit or more.But if what wind direction was measured relative to upper one hour
The change rate of wind direction is increased to five degree or more, then yawer is allowed limit to change from the first permission limit in step 90
Become the second permission limit, and being located at the second of wind energy conversion system in change rate allows period in limit to execute for the second work period.
Fig. 5 is the schematic diagram of local wind field 100, and the wind field is connected to the first yaw system in the case of being included in grid cut-off
Back-up system 118 and second yaws the first wind energy conversion system 112 and the second wind energy conversion system 114 of back-up system 120.According to the present invention one
A embodiment forms miniature power network, wherein the first wind energy conversion system 112 and the second wind energy conversion system 114 are connected to each other.In one embodiment
In, in grid cut-off, utility power breaker 136 is off and the first wind energy conversion system 112 and the second wind
The wind energy conversion system breaker 132,133 of power machine 114 is in closed state, so that the first yaw yaw of back-up system 118 and second is standby
It is connected with system 120.In such embodiments, the first yaw motor 134 of the first wind energy conversion system 112 can be based on from the second wind-force
The electric power running that second energy storage components 140 of machine 114 receive.
First yaw back-up system 118 includes the first yawer 142, First Line trackside converter 150, and second
It includes the second yawer 144 and the second line side converter 152 to yaw back-up system 120.First yawer, 142 He
Second yawer 144 is after a period of time from sensor（As shown in Figure 1）Receive wind speed and direction signal（Such as Fig. 1 institutes
Show）, and variation based on the wind speed and direction signal received from sensor and changing corresponding wind energy conversion system 112,114 allows to limit
Degree.First yawer 142 and the second yawer 144 further calculate the first energy storage components 138 and the second energy
The auxiliary power rank of storage element 140 is measured, and auxiliary power rank and corresponding energy storage components will be calculated accordingly
138,140 predetermined auxiliary power rank is compared.In one embodiment, the first energy storage components 138 and the second energy
Storage element 140 is measured also respectively to the first auxiliary wind turbine component 146 of the first wind energy conversion system 112 and the second wind energy conversion system 114 and the
Two auxiliary wind turbine components 148 are powered.In one case, the auxiliary power rank of a calculated energy storage medium,
Such as first energy storage medium 138 calculating auxiliary power rank be less than predetermined auxiliary power rank when, first yaw control
Device 142 communicates with the second yawer 144 and the second yawer 144 is asked to allow the second energy storage medium 140 logical
It crosses the second line side converter 152 to power to First Line trackside converter 150, the First Line trackside converter is controlled by partially again
Route controller 142 to the first yaw motor 134 to power, to change the yaw angle of the first wind energy conversion system 112.For simplicity
Consider, foregoing description is for two wind energy conversion systems, still, is also applied for modifying to operate N number of wind-force in wind field
Machine.
Fig. 6 is flow chart according to an embodiment of the invention, show in grid cut-off into wind field
The yaw motor of corresponding wind energy conversion system provides step involved in the method 200 for yawing non-firm power.Method 200 is included in step
In 202 wind speed and direction signal is received from sensor after a period of time.In one embodiment, it connects after a period of time
Speed of calling prisoners in after letting them out for exercise and wind direction signals include receiving wind direction signals from airspeedometer after a period of time.The method further includes in step
The permission limit of wind energy conversion system is changed with time and changed in 204 based on wind direction signals.In one embodiment, the method into
One step includes the steps that receiving wind velocity signal, and the step of wherein described change allows limit additional ground from the sensor
In the variation of wind speed or wind velocity signal after a period of time.Told method further comprises being based on allowing in step 206
Limit and control the power Transmission from the yaw motor of energy storage medium wind machine to control the yaw angle of wind energy conversion system, to
Reduce the loading condition generated by wind in wind energy conversion system.In one embodiment, it includes inciting somebody to action to control to the power Transmission of yaw motor
The predetermined auxiliary power rank for calculating the energy storage components of auxiliary power rank wind energy conversion system corresponding to being connected to is compared.
In another embodiment, the calculating auxiliary power grade for being included in corresponding energy storage medium to the power Transmission of yaw motor is controlled
Not little Yu predetermined auxiliary power rank when, control defeated from the electric power of the energy storage medium for the different wind energy conversion systems being connected in wind field
It send.In the exemplary embodiment, the work for the line side converter for including change wind energy conversion system is controlled to the power Transmission of yaw motor
Make the period, yaw angle is maintained in the dead zone limitation of wind energy conversion system.In a more specific embodiment, yaw angle is maintained extremely
Include maintaining the deviation between yaw angle and wind direction about just in area's limitation（+）Octave is to about negative（-）In the range of octave.
Make it will be appreciated that one of skill in the art will recognize that multiple features can be exchanged from different embodiments
With, and other known equivalents of multiple features and each feature can by one of skill in the art into
Row combination and matching, to constitute the other systems and technology that meet principle of the present invention.It is therefore to be understood that following claims
It is intended to cover all such modifications and variations in true spirit of the present invention.
Although the present invention only has special characteristic to illustrate and describe in the present specification, the technology people in fields
Member will be seen that many modifications and variations.It is therefore to be understood that appended claims are intended to cover in true spirit of the present invention
All such modifications and variations.
Claims (20)
1. a kind of yaw back-up system, including：
Energy storage medium for storing auxiliary power；
Yawer, in the case that grid cut-off by execute following steps come coordinate from the energy storage medium to
The power Transmission of yaw motor, to control the yaw angle of wind energy conversion system：
Over time wind direction signals are received from sensor；
Variation based on the wind direction signals over a period changes the permission limit of wind energy conversion system；And
The conveying of the auxiliary power based on the permission limit handling from the energy storage medium to the yaw motor,
To control the yaw angle, to reduce the load generated by wind on the wind energy conversion system.
2. yaw back-up system according to claim 1, wherein the yawer be further configured to carry out from
The sensor receives the step of wind velocity signal, and the step of wherein changing the permission limit is also based on the wind velocity signal
Or the variation of the wind velocity signal over a period.
3. yaw back-up system according to claim 1, wherein the sensor includes airspeedometer.
4. yaw back-up system according to claim 1 further comprises the energy storage medium being electrically connected to institute
State the line side converter of the DC link of wind energy conversion system.
5. yaw back-up system according to claim 4, wherein the yawer changes the line side converter
Work period, with control from the auxiliary power of the energy storage medium convey, the yaw angle is maintained into the wind
In the dead zone limitation of power machine.
6. yaw back-up system according to claim 1, wherein the energy storage medium includes battery.
7. yaw back-up system according to claim 1, wherein the energy storage medium has to additional auxiliary wind-force
Machine component provides the ability of auxiliary power.
8. yaw back-up system according to claim 1, wherein the yaw back-up system includes that distributed yaw is spare
System, and the wherein described yaw back-up system is connected to corresponding wind energy conversion system.
9. a kind of wind field, including：
For generating wind-powered electricity generation and the wind-powered electricity generation being transported to the wind energy conversion system of power network, wherein the wind energy conversion system is electrically connected to each other；
It is connected to the yaw back-up system of the corresponding wind energy conversion system in the wind field, for being controlled to yaw in grid cut-off
The power Transmission of motor, to control the yaw angle of corresponding wind energy conversion system, wherein the yaw back-up system includes respectively：
Energy storage medium for storing auxiliary power；
Yawer for executing following steps：
After a period of time wind direction signals are received from sensor；
Change the permission limit of corresponding wind energy conversion system based on wind direction signals variation over a period；
Calculate the auxiliary power rank for the energy storage components for being connected to corresponding wind energy conversion system；
The predetermined auxiliary power rank of the energy storage components of gained auxiliary power rank wind energy conversion system corresponding to being connected to will be calculated
It is compared；And
Based on the permission electric power input of the limit handling to corresponding yaw motor, to control the yaw angle of corresponding wind energy conversion system, from
And reduce the load generated by wind on the wind energy conversion system；The wherein described yawer is based on the permission limit, when being connected to
When the calculating auxiliary power rank of the energy storage medium of the corresponding wind energy conversion system is more than the predetermined auxiliary power rank,
Control the power Transmission from the energy storage components of corresponding wind energy conversion system；Or works as and be connected to the described of the corresponding wind energy conversion system
When the calculating auxiliary power rank of energy storage medium is less than the predetermined auxiliary power rank, control is from being connected to corresponding wind-force
The power Transmission of the energy storage components of the different wind energy conversion systems of machine, to control the yaw angle.
10. wind field according to claim 9, wherein the sensor includes airspeedometer.
11. wind field according to claim 9 further comprises the line side transformation for being electrically connected to the energy storage components
Device.
12. wind field according to claim 11, wherein the yawer changes the work of the line side converter
Period is conveyed from the auxiliary power of the energy storage medium with control, the yaw angle is maintained the wind energy conversion system
In the limitation of dead zone.
13. wind field according to claim 9, wherein the energy storage medium includes battery.
14. wind field according to claim 9, wherein the yawer is further configured to carry out from the sensing
Device receives the step of wind velocity signal, and the step of wherein changing the permission limit is also based on the wind speed or the wind speed is believed
Variation number over a period.
15. a kind of method of control wind energy conversion system, including：
After a period of time wind direction signals are received from sensor；
Variation based on the wind direction signals over a period changes the permission limit of wind energy conversion system；
Based on the permission limit, control is from energy storage medium to the power Transmission of the yaw motor of the wind energy conversion system, with control
The yaw angle for making the wind energy conversion system, to reduce in the wind energy conversion system by wind-induced loading condition.
16. according to the method for claim 15, wherein it includes described in change to control to the power Transmission of the yaw motor
The work period of the line side converter of wind energy conversion system maintains the yaw angle in the dead zone limitation of the wind energy conversion system.
17. according to the method for claim 15, further comprising counting to the power Transmission of the yaw motor wherein controlling
Calculate the auxiliary power rank for the energy storage components for being connected to the wind energy conversion system.
18. according to the method for claim 15, further comprising comparing wherein controlling to the power Transmission of the yaw motor
Compared with the predetermined auxiliary power rank for calculating auxiliary power rank and the energy storage components for being connected to the wind energy conversion system.
19. according to the method for claim 18, wherein the energy storage medium includes the first energy storage medium, and
It wherein controls and further comprises to the power Transmission of the yaw motor, if the calculating auxiliary of first energy storage medium
Electric power rank is less than the predetermined auxiliary power rank, controls the second energy storage from the second wind energy conversion system being connected in wind field
The power Transmission of medium.
20. the step of according to the method for claim 15, further comprising receiving wind velocity signal from the sensor, and
Variation of the step of wherein the changing the permission limit also based on the wind speed or the wind velocity signal over a period.
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| IN4992/CHE/2012 | 2012-11-29 | ||
| IN4992CH2012 | 2012-11-29 |
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| US (1) | US9677540B2 (en) |
| EP (1) | EP2738382B1 (en) |
| CN (1) | CN103850875B (en) |
| CA (1) | CA2833974C (en) |
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| EP2738382B1 (en) | 2021-01-13 |
| ES2863723T3 (en) | 2021-10-11 |
| CA2833974C (en) | 2018-11-06 |
| EP2738382A3 (en) | 2018-03-14 |
| CA2833974A1 (en) | 2014-05-29 |
| US20140145439A1 (en) | 2014-05-29 |
| CN103850875A (en) | 2014-06-11 |
| EP2738382A2 (en) | 2014-06-04 |
| US9677540B2 (en) | 2017-06-13 |
| DK2738382T3 (en) | 2021-04-19 |
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